Joe,
Good luck and I hope this helps you get the promotion that you should have had a long time ago. As for the knowledge some of the other vendors showed, that sounds like walking into one of the stores here and asking a question about a computer they are selling. The sales person will get the tag hanging by the computer and read it to you. They don't even know how to set one of the display computers so people can see anything more than the sign of how great Windows 7 is.
Ron
